Question

A. a type of rock that is formed over long periods of time by the transformation of existing rock types

B. a type of rock that is formed over long periods of time by layers of silt building up on the floor of a body of water

C. a type of rock formed over long periods of time by the cooling and solidification of molten Earth material

D. a type of rock that is formed in a very short period of time by sudden violent volcanic eruptions into the ocean

so it will be B. a type of rock that is formed over long periods of time by layers of silt building up on the floor of a body of water

Answer 1

Step-by-step explanation:

Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.